Means for removing superfluous metallic coating from sheet metal.



MEANS FOR REMOV PATENTBD JULY 11, 1905.

0. S. FELLOWS & A. E. HOPKINS. ING SUPERFLUOUS METALLIC COATING FROM METAL.

APPLICATION rILsn NOV. 2. 1904.

SHEET Xmwmwes. QZZaw-d W UNITED STATES Patented July 11, 1905.

PATENT OFFICE.

OLIN S. FELLOWS AND AROHIBALD E. HOPKINS, OF MIDDLETOWN,

' NEW YORK.

MEANS FOR REMOVING SUPERFLUOUS METALLIC COATlNG FROM SHEET METAL.

SPECIFICATION forming part of Letters Patent No. 794,705, dated July 11, 1905.

Original application filed October 1, 1904, Serial No. 226,793.

To all whom, it nuty concern:

Be it known that we, OLIN S. FELLOWS and AROHIBALD E. HOPKINS, citizens of the United States,residingatMiddletown,Orange county, and State of New York, have invented certain new and useful Improvements in Means for Removing Superfluous Metallic Coating from Sheet Metal, of which the following is a specification sufficient to enable others skilled in the art to which the invention appertains to make and use the same.

This application is asubdivision of our application filed October 1, 1904, Serial No. 226,793, in which we claim the method of treating coated sheet metal herein disclosed.

Our present invention, like that set forth in our concurrent application, filed September 29, 1904, Serial No. 226,441, relates to the means of removing superfluous metallic coating from sheet metal after such coating has positively set or hardened upon the surface of the sheet, particularly whatis known as list, from the selvage edge of metallic plates coated with tin, lead, zinc, or other metal or alloy, the list being occasioned by the collection of an excess of the metallic coating upon the lower edge of the sheet of metal as drawn from the rolls or bath, resulting ordinarily heretofore in a waste both of the metallic coating and of the sheet metal, since the selvage edge of the plate with the list on it is not available for use for reasons well known in the arts in which coated sheet metal is employed.

The object of our invention is to save the list or excess of metallic coating and at the same time to render all parts of the coated sheet, including the selvage edge, available for practical use, the plate being thus perfected and rendered more valuable commercially and otherwise; and our invention consists in the combination and arrangement of parts hereinafter set forth for displacing all excess of metallic coating from sheet metal, the essential and distinguishing feature being the employment of means for effecting the remelting or liq uefying in sz'tu of the set or hardened list orsuperfluous metallic coating, in conjunction with positive means for effect- Divided and this application filed November 2, 1904. Serial No. 231,042-

ing its removal from the sheet metal, as by a brush or equivalent mechanical expedient, in contradistinction to the use of a fluid-blast, as set forth in our concurrent application hereinbefore referred to.

In the accompanying drawings, Figure 1 is a plan of parts essential in treating coated sheet-metal plates according to our invention. Fig. 2 is a side elevation of the same. Fig. 3 is an elevation taken upon the side opposite to that shown in Fig. 2 and illustrating diagrammatically the position of the selvage edge of a coated sheet-metal plate under treatment. Fig. 4 is a transverse section upon plane of line 4 4, Fig. 3.

In describing the practical application of our improved means of displacing superfluous coating or list from sheet metal we herein refer to the treatment of tinned sheet-iron only by way of illustration, it being understood that we do not limit ourselves in this respect and that sheet-metal plates and metallic coatings of all kinds are included within the scope of our invention.

In the drawings, a designates the plate, and Z) the list thereon. This plate in its presentation to the remelting device and to the listremoving means may be supported in any suitable manner. (Not shown.)

A represents an elongated gas-burner or equivalent means of heating the selvage edge or other portion of a tin-coated plate, and B one or more brushes, wipers, or other mechanical expedients arranged to positively remove the liquefied excess of tin or list from the heated portion of the plate, the direction of motion of the brush or equivalent with relation to the plate being such as to drive the liquefied excess of metallic coating or list from the edge thereof, as will be understood by reference more particularly to Fig. 4. The excess of tin or other metallic coating thus removed from the plate may be collected and utilized in any suitable manner.

We are aware that various expedients have been proposed for the prevention of an excess of coating on metal plates during manufacture; but we are not aware that list or excess of metallic coating after it has set or hardened on sheet metal has ever been remelted and displaced therefrom by positive means, as herein described and claimed.

By the use of our means of remelting or liquefying the list or excess of metallic coating after the preliminary steps in the manufacture of the plate and after the excess of metallic coating has positively set or hardened upon the surface of the plate We attain certain practical advantages. The manipulation of the sheet metal to thus finish it after it has been coated and cooled may be accomplished With ease and convenience in a simple manner and by simple means, and a perfectly uniform plate of increased commercial value may thus be produced in Which the so-called selvage edge may be said to be eliminated, since it is rendered available for use like the rest of the plate. It is obvious that in accomplishing this result various modifications and mechanical expedients may be resorted to in effecting the liquation and displacement of the list or excess of metallic coating from the sheet metal Without departing from the spirit and intent of our invention, and We do not, therefore, limit ourselves to the construction and arrangement of parts shown; but

What We claim as our invention, and desire to secure by Letters Patent, is

1. In apparatus for removing superfluous metallic coating from sheet metal after the same has been coated and the coating positively set or hardened, the combination of means for applying heat to the set or hardened excess of metallic coating in such manner as to liquate the same in situ, and mechanical means for positively contacting With and removing said liquated excess of metallic coating from the sheet-metal plate.

2. In apparatus for removing superfluous metallic coating from sheet metal after the same has been coated and the coating positively set or hardened, the combination of means for applying heat to the set or hardened excess of metallic coating in such manner as to liquate the same in situ, and a brush arranged to positively remove said liquated excess of metallic coating fromthe sheet-metal plate.

3. In apparatus for removing superfluous metallic coating from sheet metal after the same has been coated and the coating positively set or hardened, the combination of means for applying heat to the set or hardened excess of metallic coating in such manner as to liquate the same in situ, and a plurality of brushes arranged to positively remove said liquated excess of metallic coating from the sheet-metal plate.

OLIN S. FELLOWS. ARGHIBALD E. HOPKINS. Witnesses:

D. W. GARDNER, GEO. Wu. MIATT. 

